LVEQNB_ReturnStatus_en LVEQNB_Process(LVEQNB_Handle_t hInstance,
const LVM_FLOAT *pInData,
LVM_FLOAT *pOutData,
LVM_UINT16 NumSamples)
{
LVM_UINT16 i;
Biquad_FLOAT_Instance_t *pBiquad;
LVEQNB_Instance_t *pInstance = (LVEQNB_Instance_t *)hInstance;
LVM_FLOAT *pScratch;
/* Check for NULL pointers */
if((hInstance == LVM_NULL) || (pInData == LVM_NULL) || (pOutData == LVM_NULL))
{
return LVEQNB_NULLADDRESS;
}
/* Check if the input and output data buffers are 32-bit aligned */
if ((((uintptr_t)pInData % 4) != 0) || (((uintptr_t)pOutData % 4) != 0))
{
return LVEQNB_ALIGNMENTERROR;
}
pScratch = (LVM_FLOAT *)pInstance->pFastTemporary;
/*
* Check the number of samples is not too large
*/
if (NumSamples > pInstance->Capabilities.MaxBlockSize)
{
return(LVEQNB_TOOMANYSAMPLES);
}
if (pInstance->Params.OperatingMode == LVEQNB_ON)
{
/*
* Copy input data in to scratch buffer
*/
Copy_Float((LVM_FLOAT *)pInData, /* Source */
pScratch, /* Destination */
(LVM_INT16)(2 * NumSamples)); /* Left and Right */
/*
* For each section execte the filter unless the gain is 0dB
*/
if (pInstance->NBands != 0)
{
for (i = 0; i < pInstance->NBands; i++)
{
/*
* Check if band is non-zero dB gain
*/
if (pInstance->pBandDefinitions[i].Gain != 0)
{
/*
* Get the address of the biquad instance
*/
pBiquad = &pInstance->pEQNB_FilterState_Float[i];
/*
* Select single or double precision as required
*/
switch (pInstance->pBiquadType[i])
{
case LVEQNB_SinglePrecision_Float:
{
PK_2I_D32F32C14G11_TRC_WRA_01(pBiquad,
(LVM_FLOAT *)pScratch,
(LVM_FLOAT *)pScratch,
(LVM_INT16)NumSamples);
break;
}
default:
break;
}
}
}
}
if(pInstance->bInOperatingModeTransition == LVM_TRUE){
LVC_MixSoft_2St_D16C31_SAT(&pInstance->BypassMixer,
(LVM_FLOAT *)pScratch,
(LVM_FLOAT *)pInData,
(LVM_FLOAT *)pScratch,
(LVM_INT16)(2 * NumSamples));
Copy_Float((LVM_FLOAT*)pScratch, /* Source */
pOutData, /* Destination */
(LVM_INT16)(2 * NumSamples)); /* Left and Right samples */
}
else{
Copy_Float(pScratch, /* Source */
pOutData, /* Destination */
(LVM_INT16 )(2 * NumSamples)); /* Left and Right */
}
}
else
{
/*
* Mode is OFF so copy the data if necessary
*/
if (pInData != pOutData)
{
Copy_Float(pInData, /* Source */
pOutData, /* Destination */
(LVM_INT16)(2 * NumSamples)); /* Left and Right samples */
}
}
return(LVEQNB_SUCCESS);
}
LVDBE_ReturnStatus_en LVDBE_Process(LVDBE_Handle_t hInstance,
const LVM_INT16 *pInData,
LVM_INT16 *pOutData,
LVM_UINT16 NumSamples)
{
LVDBE_Instance_t *pInstance =(LVDBE_Instance_t *)hInstance;
LVM_INT32 *pScratch = (LVM_INT32 *)pInstance->MemoryTable.Region[LVDBE_MEMREGION_SCRATCH].pBaseAddress;
LVM_INT32 *pMono;
LVM_INT16 *pInput = (LVM_INT16 *)pInData;
/* Scratch for Volume Control starts at offset of 2*NumSamples short values from pScratch */
LVM_INT16 *pScratchVol = (LVM_INT16 *)(&pScratch[NumSamples]);
/* Scratch for Mono path starts at offset of 2*NumSamples 32-bit values from pScratch */
pMono = &pScratch[2*NumSamples];
/*
* Check the number of samples is not too large
*/
if (NumSamples > pInstance->Capabilities.MaxBlockSize)
{
return(LVDBE_TOOMANYSAMPLES);
}
/*
* Check if the algorithm is enabled
*/
/* DBE path is processed when DBE is ON or during On/Off transitions */
if ((pInstance->Params.OperatingMode == LVDBE_ON)||
(LVC_Mixer_GetCurrent(&pInstance->pData->BypassMixer.MixerStream[0])
!=LVC_Mixer_GetTarget(&pInstance->pData->BypassMixer.MixerStream[0])))
{
/*
* Convert 16-bit samples to 32-bit and scale
* (For a 16-bit implementation apply headroom loss here)
*/
Int16LShiftToInt32_16x32(pInput, /* Source 16-bit data */
pScratch, /* Dest. 32-bit data */
(LVM_INT16)(2*NumSamples), /* Left and right */
LVDBE_SCALESHIFT); /* Shift scale */
/*
* Apply the high pass filter if selected
*/
if (pInstance->Params.HPFSelect == LVDBE_HPF_ON)
{
BQ_2I_D32F32C30_TRC_WRA_01(&pInstance->pCoef->HPFInstance,/* Filter instance */
(LVM_INT32 *)pScratch, /* Source */
(LVM_INT32 *)pScratch, /* Destination */
(LVM_INT16)NumSamples); /* Number of samples */
}
/*
* Create the mono stream
*/
From2iToMono_32(pScratch, /* Stereo source */
pMono, /* Mono destination */
(LVM_INT16)NumSamples); /* Number of samples */
/*
* Apply the band pass filter
*/
BP_1I_D32F32C30_TRC_WRA_02(&pInstance->pCoef->BPFInstance, /* Filter instance */
(LVM_INT32 *)pMono, /* Source */
(LVM_INT32 *)pMono, /* Destination */
(LVM_INT16)NumSamples); /* Number of samples */
/*
* Apply the AGC and mix
*/
AGC_MIX_VOL_2St1Mon_D32_WRA(&pInstance->pData->AGCInstance, /* Instance pointer */
pScratch, /* Stereo source */
pMono, /* Mono band pass source */
pScratch, /* Stereo destination */
NumSamples); /* Number of samples */
/*
* Convert 32-bit samples to 16-bit and saturate
* (Not required for 16-bit implemenations)
*/
Int32RShiftToInt16_Sat_32x16(pScratch, /* Source 32-bit data */
(LVM_INT16 *)pScratch, /* Dest. 16-bit data */
(LVM_INT16)(2*NumSamples), /* Left and right */
LVDBE_SCALESHIFT); /* Shift scale */
}
/* Bypass Volume path is processed when DBE is OFF or during On/Off transitions */
if ((pInstance->Params.OperatingMode == LVDBE_OFF)||
(LVC_Mixer_GetCurrent(&pInstance->pData->BypassMixer.MixerStream[1])
!=LVC_Mixer_GetTarget(&pInstance->pData->BypassMixer.MixerStream[1])))
{
/*
* The algorithm is disabled but volume management is required to compensate for
* headroom and volume (if enabled)
*/
LVC_MixSoft_1St_D16C31_SAT(&pInstance->pData->BypassVolume,
pInData,
pScratchVol,
(LVM_INT16)(2*NumSamples)); /* Left and right */
}
/*
* Mix DBE processed path and bypass volume path
*/
LVC_MixSoft_2St_D16C31_SAT(&pInstance->pData->BypassMixer,
(LVM_INT16 *) pScratch,
pScratchVol,
pOutData,
(LVM_INT16)(2*NumSamples));
return(LVDBE_SUCCESS);
}